Remove deepmerge

src/package.json

@@ -12,7 +12,6 @@
     "auto-launch": "^5.0.1",
     "bootstrap": "^3.3.7",
     "create-react-class": "^15.6.2",
-    "deepmerge": "^1.5.2",
     "electron-context-menu": "^0.9.0",
     "electron-devtools-installer": "^2.2.1",
     "electron-is-dev": "^0.3.0",

src/yarn.lock

@@ -141,10 +141,6 @@ decamelize@^1.1.1:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/decamelize/-/decamelize-1.2.0.tgz#f6534d15148269b20352e7bee26f501f9a191290"
 
-deepmerge@^1.5.2:
-  version "1.5.2"
-  resolved "https://registry.yarnpkg.com/deepmerge/-/deepmerge-1.5.2.tgz#10499d868844cdad4fee0842df8c7f6f0c95a753"
-
 dom-helpers@^3.2.0, dom-helpers@^3.2.1:
   version "3.2.1"
   resolved "https://registry.yarnpkg.com/dom-helpers/-/dom-helpers-3.2.1.tgz#3203e07fed217bd1f424b019735582fc37b2825a"